Kobo: On sunxi, add a delay between the white flash and the sleep screen.
Kobo: On sunxi, add a delay between the white flash and the sleep
screen.

Otherwise, on the Sage, weird flash glitches may happen, depending on
what was on screen...
(e.g., there's some weird update merging shenanigans going on
despite those updates being flagged NO_MERGE...).

poire-z/koreader,NiLuJe/koreader,Frenzie/koreader,NiLuJe/koreader,Frenzie/koreader,koreader/koreader,koreader/koreader,poire-z/koreader